Computer Science – Performance
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984adans..54..111e&link_type=abstract
IN: Astrodynamics 1983; Proceedings of the Conference, Lake Placid, NY, August 22-25, 1983. Part 1 (A84-30526 13-13). San Diego,
Computer Science
Performance
Orbit Calculation, Performance Prediction, Space Navigation, Tdr Satellites, Very Long Base Interferometry, Covariance, Data Processing, Error Analysis, Space Transportation System
Scientific paper
Results of a covariance study to evaluate the performance of a proposed Very Long Baseline Interferometric (VLBI) system for TDRSS orbit determination (OD) are presented. This dedicated VLBI system consists of 4 one meter antennas for each TDRS positioned on orthogonal 6000 km baselines and uses a GPS signal for clock synchronization and calibration of measurement error sources. The performance of the VLBI system is compared with the current BRT system for support of TDRSS navigation. The criteria for evaluating the system performance is the TDRSS OD accuracy and the resulting navigation accuracy for two typical TDRSS users represented by a TOPEX type orbit and a Space Shuttle orbit. Based on the anticipated characteristics of a 1990 era VLBI system a factor of 20 improvement can be expected in the TDRSS OD accuracy. This translates into accuracy improvements ranging from factors of 3 to 10 for typical TDRSS users.
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